/* X-specific Lisp objects. Copyright (C) 1993, 1994 Free Software Foundation, Inc. Copyright (C) 1995 Board of Trustees, University of Illinois. Copyright (C) 1995 Tinker Systems. Copyright (C) 1995, 1996 Ben Wing. Copyright (C) 1995 Sun Microsystems, Inc.This file is part of XEmacs.XEmacs is free software; you can redistribute it and/or modify itunder the terms of the GNU General Public License as published by theFree Software Foundation; either version 2, or (at your option) anylater version.XEmacs is distributed in the hope that it will be useful, but WITHOUTANY WARRANTY; without even the implied warranty of MERCHANTABILITY orFITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public Licensefor more details.You should have received a copy of the GNU General Public Licensealong with XEmacs; see the file COPYING. If not, write tothe Free Software Foundation, Inc., 59 Temple Place - Suite 330,Boston, MA 02111-1307, USA. *//* Synched up with: Not in FSF. *//* Authors: Jamie Zawinski, Chuck Thompson, Ben Wing */#include <config.h>#include "lisp.h"#include "console-x.h"#include "objects-x.h"#include "buffer.h"#include "device.h"#include "insdel.h"inthandle_nonfull_spec_fonts;/************************************************************************//* color instances *//************************************************************************//* Replacement for XAllocColor() that tries to return the nearest available color if the colormap is full. Original was from FSFmacs, but rewritten by Jareth Hein <jareth@camelot-soft.com> 97/11/25 *//* Return value is 1 for normal success, 2 for nearest color success, 3 for Non-deallocable sucess, and 0 for absolute failure (shouldn't happen?) */intallocate_nearest_color(Display*display,Colormapcolormap,Visual*visual,XColor*color_def){intstatus;if(visual->class==DirectColor||visual->class==TrueColor){if(XAllocColor(display,colormap,color_def)!=0){status=1;}else{/* We're dealing with a TrueColor/DirectColor visual, so play games with the RGB values in the XColor struct. *//* ### JH: I'm not sure how a call to XAllocColor can fail in a TrueColor or DirectColor visual, so I will just reformat the request to match the requirements of the visual, and re-issue the request. If this fails for anybody, I wanna know about it so I can come up with a better plan */unsignedlongrshift,gshift,bshift,rbits,gbits,bbits,junk;junk=visual->red_mask;rshift=0;while((junk&0x1)==0){junk=junk>>1;rshift++;}rbits=0;while(junk!=0){junk=junk>>1;rbits++;}junk=visual->green_mask;gshift=0;while((junk&0x1)==0){junk=junk>>1;gshift++;}gbits=0;while(junk!=0){junk=junk>>1;gbits++;}junk=visual->blue_mask;bshift=0;while((junk&0x1)==0){junk=junk>>1;bshift++;}bbits=0;while(junk!=0){junk=junk>>1;bbits++;}color_def->red=color_def->red>>(16-rbits);color_def->green=color_def->green>>(16-gbits);color_def->blue=color_def->blue>>(16-bbits);if(XAllocColor(display,colormap,color_def)!=0)status=1;else{/* ### JH: I'm punting here, knowing that doing this will at least draw the color correctly. However, unless we convert all of the functions that allocate colors (graphics libraries, etc) to use this function doing this is very likely to cause problems later... */color_def->pixel=(color_def->red<<rshift)|(color_def->green<<gshift)|(color_def->blue<<bshift);status=3;}}}else{if(XAllocColor(display,colormap,color_def)!=0)status=1;else{/* If we got to this point, the colormap is full, so we're going to try and get the next closest color. The algorithm used is a least-squares matching, which is what X uses for closest color matching with StaticColor visuals. */XColor*cells;/* JH: I can't believe there's no way to go backwards from a colormap ID and get its visual and number of entries, but X apparently isn't built that way... */intno_cells=visual->map_entries;intnearest;longnearest_delta,trial_delta;intx;cells=alloca_array(XColor,no_cells);for(x=0;x<no_cells;x++)cells[x].pixel=x;/* read the current colormap */XQueryColors(display,colormap,cells,no_cells);nearest=0;/* I'm assuming CSE so I'm not going to condense this. */nearest_delta=((((color_def->red>>8)-(cells[0].red>>8))*((color_def->red>>8)-(cells[0].red>>8)))+(((color_def->green>>8)-(cells[0].green>>8))*((color_def->green>>8)-(cells[0].green>>8)))+(((color_def->blue>>8)-(cells[0].blue>>8))*((color_def->blue>>8)-(cells[0].blue>>8))));for(x=1;x<no_cells;x++){trial_delta=((((color_def->red>>8)-(cells[x].red>>8))*((color_def->red>>8)-(cells[x].red>>8)))+(((color_def->green>>8)-(cells[x].green>>8))*((color_def->green>>8)-(cells[x].green>>8)))+(((color_def->blue>>8)-(cells[x].blue>>8))*((color_def->blue>>8)-(cells[x].blue>>8))));if(trial_delta<nearest_delta){nearest=x;nearest_delta=trial_delta;}}color_def->red=cells[nearest].red;color_def->green=cells[nearest].green;color_def->blue=cells[nearest].blue;if(XAllocColor(display,colormap,color_def)!=0)status=2;elsestatus=0;/* JH: how does this happen??? DOES this happen??? */}}returnstatus;}intx_parse_nearest_color(structdevice*d,XColor*color,Bufbyte*name,Bytecountlen,Error_behaviorerrb){Display*dpy;Screen*xs;Colormapcmap;Visual*visual;intresult;dpy=DEVICE_X_DISPLAY(d);xs=DefaultScreenOfDisplay(dpy);cmap=DEVICE_X_COLORMAP(d);visual=DEVICE_X_VISUAL(d);memset(color,0,sizeof(*color));{CONSTExtbyte*extname;Extcountextnamelen;GET_CHARPTR_EXT_BINARY_DATA_ALLOCA(name,len,extname,extnamelen);result=XParseColor(dpy,cmap,(char*)extname,color);}if(!result){maybe_signal_simple_error("unrecognized color",make_string(name,len),Qcolor,errb);return0;}result=allocate_nearest_color(dpy,cmap,visual,color);if(!result){maybe_signal_simple_error("couldn't allocate color",make_string(name,len),Qcolor,errb);return0;}returnresult;}staticintx_initialize_color_instance(structLisp_Color_Instance*c,Lisp_Objectname,Lisp_Objectdevice,Error_behaviorerrb){XColorcolor;intresult;result=x_parse_nearest_color(XDEVICE(device),&color,XSTRING_DATA(name),XSTRING_LENGTH(name),errb);if(!result)return0;/* Don't allocate the data until we're sure that we will succeed, or the finalize method may get fucked. */c->data=xnew(structx_color_instance_data);if(result==3)COLOR_INSTANCE_X_DEALLOC(c)=0;elseCOLOR_INSTANCE_X_DEALLOC(c)=1;COLOR_INSTANCE_X_COLOR(c)=color;return1;}staticvoidx_print_color_instance(structLisp_Color_Instance*c,Lisp_Objectprintcharfun,intescapeflag){charbuf[100];XColorcolor=COLOR_INSTANCE_X_COLOR(c);sprintf(buf," %ld=(%X,%X,%X)",color.pixel,color.red,color.green,color.blue);write_c_string(buf,printcharfun);}staticvoidx_finalize_color_instance(structLisp_Color_Instance*c){if(c->data){if(DEVICE_LIVE_P(XDEVICE(c->device))){if(COLOR_INSTANCE_X_DEALLOC(c)){XFreeColors(DEVICE_X_DISPLAY(XDEVICE(c->device)),DEVICE_X_COLORMAP(XDEVICE(c->device)),&COLOR_INSTANCE_X_COLOR(c).pixel,1,0);}}xfree(c->data);c->data=0;}}/* Color instances are equal if they resolve to the same color on the screen (have the same RGB values). I imagine that "same RGB values" == "same cell in the colormap." Arguably we should be comparing their names or pixel values instead. */staticintx_color_instance_equal(structLisp_Color_Instance*c1,structLisp_Color_Instance*c2,intdepth){XColorcolor1=COLOR_INSTANCE_X_COLOR(c1);XColorcolor2=COLOR_INSTANCE_X_COLOR(c2);return((color1.red==color2.red)&&(color1.green==color2.green)&&(color1.blue==color2.blue));}staticunsignedlongx_color_instance_hash(structLisp_Color_Instance*c,intdepth){XColorcolor=COLOR_INSTANCE_X_COLOR(c);returnHASH3(color.red,color.green,color.blue);}staticLisp_Objectx_color_instance_rgb_components(structLisp_Color_Instance*c){XColorcolor=COLOR_INSTANCE_X_COLOR(c);return(list3(make_int(color.red),make_int(color.green),make_int(color.blue)));}staticintx_valid_color_name_p(structdevice*d,Lisp_Objectcolor){XColorc;Display*dpy=DEVICE_X_DISPLAY(d);Colormapcmap=DEVICE_X_COLORMAP(d);CONSTchar*extname;GET_C_STRING_CTEXT_DATA_ALLOCA(color,extname);returnXParseColor(dpy,cmap,extname,&c);}/************************************************************************//* font instances *//************************************************************************/staticintx_initialize_font_instance(structLisp_Font_Instance*f,Lisp_Objectname,Lisp_Objectdevice,Error_behaviorerrb){Display*dpy;XFontStruct*xf;CONSTchar*extname;dpy=DEVICE_X_DISPLAY(XDEVICE(device));GET_C_STRING_CTEXT_DATA_ALLOCA(f->name,extname);xf=XLoadQueryFont(dpy,extname);if(!xf){maybe_signal_simple_error("couldn't load font",f->name,Qfont,errb);return0;}if(!xf->max_bounds.width){/* yes, this has been known to happen. */XFreeFont(dpy,xf);maybe_signal_simple_error("X font is too small",f->name,Qfont,errb);return0;}/* Don't allocate the data until we're sure that we will succeed, or the finalize method may get fucked. */f->data=xnew(structx_font_instance_data);FONT_INSTANCE_X_TRUENAME(f)=Qnil;FONT_INSTANCE_X_FONT(f)=xf;f->ascent=xf->ascent;f->descent=xf->descent;f->height=xf->ascent+xf->descent;{/* following change suggested by Ted Phelps <phelps@dstc.edu.au> */unsignedintdef_char='n';/*xf->default_char;*/intbyte1,byte2;once_more:byte1=def_char>>8;byte2=def_char&0xFF;if(xf->per_char){/* Old versions of the R5 font server have garbage (>63k) as def_char. 'n' might not be a valid character. */if(byte1<xf->min_byte1||byte1>xf->max_byte1||byte2<xf->min_char_or_byte2||byte2>xf->max_char_or_byte2)f->width=0;elsef->width=xf->per_char[(byte1-xf->min_byte1)*(xf->max_char_or_byte2-xf->min_char_or_byte2+1)+(byte2-xf->min_char_or_byte2)].width;}elsef->width=xf->max_bounds.width;/* Some fonts have a default char whose width is 0. This is no good. If that's the case, first try 'n' as the default char, and if n has 0 width too (unlikely) then just use the max width. */if(f->width==0){if(def_char==xf->default_char)f->width=xf->max_bounds.width;else{def_char=xf->default_char;gotoonce_more;}}}/* If all characters don't exist then there could potentially be 0-width characters lurking out there. Not setting this flag trips an optimization that would make them appear to have width to redisplay. This is bad. So we set it if not all characters have the same width or if not all characters are defined. *//* #### This sucks. There is a measurable performance increase when using proportional width fonts if this flag is not set. Unfortunately so many of the fucking X fonts are not fully defined that we could almost just get rid of this damn flag and make it an assertion. */f->proportional_p=(xf->min_bounds.width!=xf->max_bounds.width||(handle_nonfull_spec_fonts&&!xf->all_chars_exist));return1;}staticvoidx_mark_font_instance(structLisp_Font_Instance*f,void(*markobj)(Lisp_Object)){((markobj)(FONT_INSTANCE_X_TRUENAME(f)));}staticvoidx_print_font_instance(structLisp_Font_Instance*f,Lisp_Objectprintcharfun,intescapeflag){charbuf[200];sprintf(buf," 0x%lx",(unsignedlong)FONT_INSTANCE_X_FONT(f)->fid);write_c_string(buf,printcharfun);}staticvoidx_finalize_font_instance(structLisp_Font_Instance*f){if(f->data){if(DEVICE_LIVE_P(XDEVICE(f->device))){Display*dpy=DEVICE_X_DISPLAY(XDEVICE(f->device));XFreeFont(dpy,FONT_INSTANCE_X_FONT(f));}xfree(f->data);f->data=0;}}/* Determining the truename of a font is hard. (Big surprise.) By "truename" we mean an XLFD-form name which contains no wildcards, yet which resolves to *exactly* the same font as the one which we already have the (probably wildcarded) name and `XFontStruct' of. One might think that the first font returned by XListFonts would be the one that XOpenFont would pick. Apparently this is the case on some servers, but not on others. It would seem not to be specified. The MIT R5 server sometimes appears to be picking the lexicographically smallest font which matches the name (thus picking "adobe" fonts before "bitstream" fonts even if the bitstream fonts are earlier in the path, and also picking 100dpi adobe fonts over 75dpi adobe fonts even though the 75dpi are in the path earlier) but sometimes appears to be doing something else entirely (for example, removing the bitsream fonts from the path will cause the 75dpi adobe fonts to be used instead of the100dpi, even though their relative positions in the path (and their names!) have not changed). The documentation for XSetFontPath() seems to indicate that the order of entries in the font path means something, but it's pretty noncommital about it, and the spirit of the law is apparently not being obeyed... All the fonts I've seen have a property named `FONT' which contains the truename of the font. However, there are two problems with using this: the first is that the X Protocol Document is quite explicit that all properties are optional, so we can't depend on it being there. The second is that it's concievable that this alleged truename isn't actually accessible as a font, due to some difference of opinion between the font designers and whoever installed the font on the system. So, our first attempt is to look for a FONT property, and then verify that the name there is a valid name by running XListFonts on it. There's still the potential that this could be true but we could still be being lied to, but that seems pretty remote. Late breaking news: I've gotten reports that SunOS 4.1.3U1 with OpenWound 3.0 has a font whose truename is really "-Adobe-Courier-Medium-R-Normal--12-120-75-75-M-70-ISO8859-1" but whose FONT property contains "Courier". So we disbelieve the FONT property unless it begins with a dash and is more than 30 characters long. X Windows: The defacto substandard. X Windows: Complex nonsolutions to simple nonproblems. X Windows: Live the nightmare. If the FONT property doesn't exist, then we try and construct an XLFD name out of the other font properties (FOUNDRY, FAMILY_NAME, WEIGHT_NAME, etc). This is necessary at least for some versions of OpenWound. But who knows what the future will bring. If that doesn't work, then we use XListFonts and either take the first font (which I think is the most sensible thing) or we find the lexicographically least, depending on whether the preprocessor constant `XOPENFONT_SORTS' is defined. This sucks because the two behaviors are a property of the server being used, not the architecture on which emacs has been compiled. Also, as I described above, sorting isn't ALWAYS what the server does. Really it does something seemingly random. There is no reliable way to win if the FONT property isn't present. Another possibility which I haven't bothered to implement would be to map over all of the matching fonts and find the first one that has the same character metrics as the font we already have loaded. Even if this didn't return exactly the same font, it would at least return one whose characters were the same sizes, which would probably be good enough. More late-breaking news: on RS/6000 AIX 3.2.4, the expression XLoadQueryFont (dpy, "-*-Fixed-Medium-R-*-*-*-130-75-75-*-*-ISO8859-1") actually returns the font -Misc-Fixed-Medium-R-Normal--13-120-75-75-C-80-ISO8859-1 which is crazy, because that font doesn't even match that pattern! It is also not included in the output produced by `xlsfonts' with that pattern. So this is yet another example of XListFonts() and XOpenFont() using completely different algorithms. This, however, is a goofier example of this bug, because in this case, it's not just the search order that is different -- the sets don't even intersect. If anyone has any better ideas how to do this, or any insights on what it is that the various servers are actually doing, please let me know! -- jwz. */staticintvalid_x_font_name_p(Display*dpy,char*name){/* Maybe this should be implemented by callign XLoadFont and trapping the error. That would be a lot of work, and wasteful as hell, but might be more correct. */intnnames=0;char**names=0;if(!name)return0;names=XListFonts(dpy,name,1,&nnames);if(names)XFreeFontNames(names);return(nnames!=0);}staticchar*truename_via_FONT_prop(Display*dpy,XFontStruct*font){unsignedlongvalue=0;char*result=0;if(XGetFontProperty(font,XA_FONT,&value))result=XGetAtomName(dpy,value);/* result is now 0, or the string value of the FONT property. */if(result){/* Verify that result is an XLFD name (roughly...) */if(result[0]!='-'||strlen(result)<(unsignedint)30){XFree(result);result=0;}}returnresult;/* this must be freed by caller if non-0 */}staticchar*truename_via_random_props(Display*dpy,XFontStruct*font){structdevice*d=get_device_from_display(dpy);unsignedlongvalue=0;char*foundry,*family,*weight,*slant,*setwidth,*add_style;unsignedlongpixel,point,res_x,res_y;char*spacing;unsignedlongavg_width;char*registry,*encoding;charcomposed_name[2048];intok=0;char*result;#define get_string(atom,var) \ if (XGetFontProperty (font, (atom), &value)) \ var = XGetAtomName (dpy, value); \ else { \ var = 0; \ goto FAIL; }#define get_number(atom,var) \ if (!XGetFontProperty (font, (atom), &var) || \ var > 999) \ goto FAIL;foundry=family=weight=slant=setwidth=0;add_style=spacing=registry=encoding=0;get_string(DEVICE_XATOM_FOUNDRY(d),foundry);get_string(DEVICE_XATOM_FAMILY_NAME(d),family);get_string(DEVICE_XATOM_WEIGHT_NAME(d),weight);get_string(DEVICE_XATOM_SLANT(d),slant);get_string(DEVICE_XATOM_SETWIDTH_NAME(d),setwidth);get_string(DEVICE_XATOM_ADD_STYLE_NAME(d),add_style);get_number(DEVICE_XATOM_PIXEL_SIZE(d),pixel);get_number(DEVICE_XATOM_POINT_SIZE(d),point);get_number(DEVICE_XATOM_RESOLUTION_X(d),res_x);get_number(DEVICE_XATOM_RESOLUTION_Y(d),res_y);get_string(DEVICE_XATOM_SPACING(d),spacing);get_number(DEVICE_XATOM_AVERAGE_WIDTH(d),avg_width);get_string(DEVICE_XATOM_CHARSET_REGISTRY(d),registry);get_string(DEVICE_XATOM_CHARSET_ENCODING(d),encoding);#undef get_number#undef get_stringsprintf(composed_name,"-%s-%s-%s-%s-%s-%s-%ld-%ld-%ld-%ld-%s-%ld-%s-%s",foundry,family,weight,slant,setwidth,add_style,pixel,point,res_x,res_y,spacing,avg_width,registry,encoding);ok=1;FAIL:if(ok){intL=strlen(composed_name)+1;result=(char*)xmalloc(L);strncpy(result,composed_name,L);}elseresult=0;if(foundry)XFree(foundry);if(family)XFree(family);if(weight)XFree(weight);if(slant)XFree(slant);if(setwidth)XFree(setwidth);if(add_style)XFree(add_style);if(spacing)XFree(spacing);if(registry)XFree(registry);if(encoding)XFree(encoding);returnresult;}/* Unbounded, for sufficiently small values of infinity... */#define MAX_FONT_COUNT 5000staticchar*truename_via_XListFonts(Display*dpy,char*font_name){char*result=0;char**names;intcount=0;#ifndef XOPENFONT_SORTS/* In a sensible world, the first font returned by XListFonts() would be the font that XOpenFont() would use. */names=XListFonts(dpy,font_name,1,&count);if(count)result=names[0];#else/* But the world I live in is much more perverse. */names=XListFonts(dpy,font_name,MAX_FONT_COUNT,&count);while(count--)/* If names[count] is lexicographically less than result, use it. (#### Should we be comparing case-insensitively?) */if(result==0||(strcmp(result,names[count])<0))result=names[count];#endifif(result)result=xstrdup(result);if(names)XFreeFontNames(names);returnresult;/* this must be freed by caller if non-0 */}staticLisp_Objectx_font_truename(Display*dpy,char*name,XFontStruct*font){char*truename_FONT=0;char*truename_random=0;char*truename=0;/* The search order is: - if FONT property exists, and is a valid name, return it. - if the other props exist, and add up to a valid name, return it. - if we find a matching name with XListFonts, return it. - if FONT property exists, return it regardless. - if other props exist, return the resultant name regardless. - else return 0. */truename=truename_FONT=truename_via_FONT_prop(dpy,font);if(truename&&!valid_x_font_name_p(dpy,truename))truename=0;if(!truename)truename=truename_random=truename_via_random_props(dpy,font);if(truename&&!valid_x_font_name_p(dpy,truename))truename=0;if(!truename&&name)truename=truename_via_XListFonts(dpy,name);if(!truename){/* Gag - we weren't able to find a seemingly-valid truename. Well, maybe we're on one of those braindead systems where XListFonts() and XLoadFont() are in violent disagreement. If we were able to compute a truename, try using that even if evidence suggests that it's not a valid name - because maybe it is, really, and that's better than nothing. X Windows: You'll envy the dead. */if(truename_FONT)truename=truename_FONT;elseif(truename_random)truename=truename_random;}/* One or both of these are not being used - free them. */if(truename_FONT&&truename_FONT!=truename)XFree(truename_FONT);if(truename_random&&truename_random!=truename)XFree(truename_random);if(truename){Lisp_Objectresult=build_string(truename);XFree(truename);returnresult;}elsereturnQnil;}staticLisp_Objectx_font_instance_truename(structLisp_Font_Instance*f,Error_behaviorerrb){structdevice*d=XDEVICE(f->device);if(NILP(FONT_INSTANCE_X_TRUENAME(f))){Display*dpy=DEVICE_X_DISPLAY(d);char*name=(char*)XSTRING_DATA(f->name);{FONT_INSTANCE_X_TRUENAME(f)=x_font_truename(dpy,name,FONT_INSTANCE_X_FONT(f));}if(NILP(FONT_INSTANCE_X_TRUENAME(f))){Lisp_Objectfont_instance=Qnil;XSETFONT_INSTANCE(font_instance,f);maybe_signal_simple_error("couldn't determine font truename",font_instance,Qfont,errb);/* Ok, just this once, return the font name as the truename. (This is only used by Fequal() right now.) */returnf->name;}}return(FONT_INSTANCE_X_TRUENAME(f));}staticLisp_Objectx_font_instance_properties(structLisp_Font_Instance*f){structdevice*d=XDEVICE(f->device);inti;Lisp_Objectresult=Qnil;XFontProp*props;Display*dpy;dpy=DEVICE_X_DISPLAY(d);props=FONT_INSTANCE_X_FONT(f)->properties;for(i=FONT_INSTANCE_X_FONT(f)->n_properties-1;i>=0;i--){char*name_str=0;char*val_str=0;Lisp_Objectname,value;Atomatom=props[i].name;name_str=XGetAtomName(dpy,atom);name=(name_str?intern(name_str):Qnil);if(name_str&&(atom==XA_FONT||atom==DEVICE_XATOM_FOUNDRY(d)||atom==DEVICE_XATOM_FAMILY_NAME(d)||atom==DEVICE_XATOM_WEIGHT_NAME(d)||atom==DEVICE_XATOM_SLANT(d)||atom==DEVICE_XATOM_SETWIDTH_NAME(d)||atom==DEVICE_XATOM_ADD_STYLE_NAME(d)||atom==DEVICE_XATOM_SPACING(d)||atom==DEVICE_XATOM_CHARSET_REGISTRY(d)||atom==DEVICE_XATOM_CHARSET_ENCODING(d)||!strcmp(name_str,"CHARSET_COLLECTIONS")||!strcmp(name_str,"FONTNAME_REGISTRY")||!strcmp(name_str,"CLASSIFICATION")||!strcmp(name_str,"COPYRIGHT")||!strcmp(name_str,"DEVICE_FONT_NAME")||!strcmp(name_str,"FULL_NAME")||!strcmp(name_str,"MONOSPACED")||!strcmp(name_str,"QUALITY")||!strcmp(name_str,"RELATIVE_SET")||!strcmp(name_str,"RELATIVE_WEIGHT")||!strcmp(name_str,"STYLE"))){val_str=XGetAtomName(dpy,props[i].card32);value=(val_str?build_string(val_str):Qnil);}elsevalue=make_int(props[i].card32);if(name_str)XFree(name_str);result=Fcons(Fcons(name,value),result);}returnresult;}staticLisp_Objectx_list_fonts(Lisp_Objectpattern,Lisp_Objectdevice){char**names;intcount=0;Lisp_Objectresult=Qnil;CONSTchar*patternext;GET_C_STRING_BINARY_DATA_ALLOCA(pattern,patternext);names=XListFonts(DEVICE_X_DISPLAY(XDEVICE(device)),patternext,MAX_FONT_COUNT,&count);while(count--)result=Fcons(build_ext_string(names[count],FORMAT_BINARY),result);if(names)XFreeFontNames(names);returnresult;}#ifdef MULEstaticintx_font_spec_matches_charset(structdevice*d,Lisp_Objectcharset,CONSTBufbyte*nonreloc,Lisp_Objectreloc,Bytecountoffset,Bytecountlength){if(UNBOUNDP(charset))return1;/* Hack! Short font names don't have the registry in them, so we just assume the user knows what they're doing in the case of ASCII. For other charsets, you gotta give the long form; sorry buster. */if(EQ(charset,Vcharset_ascii)){CONSTBufbyte*the_nonreloc=nonreloc;inti;Bytecountthe_length=length;if(!the_nonreloc)the_nonreloc=XSTRING_DATA(reloc);fixup_internal_substring(nonreloc,reloc,offset,&the_length);the_nonreloc+=offset;if(!memchr(the_nonreloc,'*',the_length)){for(i=0;;i++){CONSTBufbyte*new_nonreloc=(CONSTBufbyte*)memchr(the_nonreloc,'-',the_length);if(!new_nonreloc)break;new_nonreloc++;the_length-=new_nonreloc-the_nonreloc;the_nonreloc=new_nonreloc;}/* If it has less than 5 dashes, it's a short font. Of course, long fonts always have 14 dashes or so, but short fonts never have more than 1 or 2 dashes, so this is some sort of reasonable heuristic. */if(i<5)return1;}}return(fast_string_match(XCHARSET_REGISTRY(charset),nonreloc,reloc,offset,length,1,ERROR_ME,0)>=0);}/* find a font spec that matches font spec FONT and also matches (the registry of) CHARSET. */staticLisp_Objectx_find_charset_font(Lisp_Objectdevice,Lisp_Objectfont,Lisp_Objectcharset){char**names;intcount=0;Lisp_Objectresult=Qnil;CONSTchar*patternext;inti;GET_C_STRING_BINARY_DATA_ALLOCA(font,patternext);names=XListFonts(DEVICE_X_DISPLAY(XDEVICE(device)),patternext,MAX_FONT_COUNT,&count);for(i=0;i<count;i++){CONSTchar*intname;GET_C_CHARPTR_INT_BINARY_DATA_ALLOCA(names[i],intname);if(x_font_spec_matches_charset(XDEVICE(device),charset,(unsignedchar*)intname,Qnil,0,-1)){result=build_string(intname);break;}}if(names)XFreeFontNames(names);/* Check for a short font name. */if(NILP(result)&&x_font_spec_matches_charset(XDEVICE(device),charset,0,font,0,-1))returnfont;returnresult;}#endif /* MULE *//************************************************************************//* initialization *//************************************************************************/voidsyms_of_objects_x(void){}voidconsole_type_create_objects_x(void){/* object methods */CONSOLE_HAS_METHOD(x,initialize_color_instance);CONSOLE_HAS_METHOD(x,print_color_instance);CONSOLE_HAS_METHOD(x,finalize_color_instance);CONSOLE_HAS_METHOD(x,color_instance_equal);CONSOLE_HAS_METHOD(x,color_instance_hash);CONSOLE_HAS_METHOD(x,color_instance_rgb_components);CONSOLE_HAS_METHOD(x,valid_color_name_p);CONSOLE_HAS_METHOD(x,initialize_font_instance);CONSOLE_HAS_METHOD(x,mark_font_instance);CONSOLE_HAS_METHOD(x,print_font_instance);CONSOLE_HAS_METHOD(x,finalize_font_instance);CONSOLE_HAS_METHOD(x,font_instance_truename);CONSOLE_HAS_METHOD(x,font_instance_properties);CONSOLE_HAS_METHOD(x,list_fonts);#ifdef MULECONSOLE_HAS_METHOD(x,find_charset_font);CONSOLE_HAS_METHOD(x,font_spec_matches_charset);#endif}voidvars_of_objects_x(void){DEFVAR_BOOL("x-handle-non-fully-specified-fonts",&handle_nonfull_spec_fonts/*If this is true then fonts which do not have all characters specifiedwill be considered to be proportional width even if they are actuallyfixed-width. If this is not done then characters which are supposed tohave 0 width may appear to actually have some width.Note: While setting this to t guarantees correct output in allcircumstances, it also causes a noticeable performance hit when usingfixed-width fonts. Since most people don't use characters which couldcause problems this is set to nil by default.*/);handle_nonfull_spec_fonts=0;}voidXatoms_of_objects_x(structdevice*d){Display*D=DEVICE_X_DISPLAY(d);DEVICE_XATOM_FOUNDRY(d)=XInternAtom(D,"FOUNDRY",False);DEVICE_XATOM_FAMILY_NAME(d)=XInternAtom(D,"FAMILY_NAME",False);DEVICE_XATOM_WEIGHT_NAME(d)=XInternAtom(D,"WEIGHT_NAME",False);DEVICE_XATOM_SLANT(d)=XInternAtom(D,"SLANT",False);DEVICE_XATOM_SETWIDTH_NAME(d)=XInternAtom(D,"SETWIDTH_NAME",False);DEVICE_XATOM_ADD_STYLE_NAME(d)=XInternAtom(D,"ADD_STYLE_NAME",False);DEVICE_XATOM_PIXEL_SIZE(d)=XInternAtom(D,"PIXEL_SIZE",False);DEVICE_XATOM_POINT_SIZE(d)=XInternAtom(D,"POINT_SIZE",False);DEVICE_XATOM_RESOLUTION_X(d)=XInternAtom(D,"RESOLUTION_X",False);DEVICE_XATOM_RESOLUTION_Y(d)=XInternAtom(D,"RESOLUTION_Y",False);DEVICE_XATOM_SPACING(d)=XInternAtom(D,"SPACING",False);DEVICE_XATOM_AVERAGE_WIDTH(d)=XInternAtom(D,"AVERAGE_WIDTH",False);DEVICE_XATOM_CHARSET_REGISTRY(d)=XInternAtom(D,"CHARSET_REGISTRY",False);DEVICE_XATOM_CHARSET_ENCODING(d)=XInternAtom(D,"CHARSET_ENCODING",False);}